RDMA/hns: Split bool statement and assign statement

Assign statement can not be contained in bool statement or
function param.

Signed-off-by: Lang Cheng <chenglang@huawei.com>
Link: https://lore.kernel.org/r/1565276034-97329-9-git-send-email-oulijun@huawei.com


Signed-off-by: Doug Ledford <dledford@redhat.com>